Commit | Line | Data |
---|---|---|
1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
ed0e3520 | 2 | /* |
3 | * OMAP3XXX L3 Interconnect Driver | |
4 | * | |
5 | * Copyright (C) 2011 Texas Corporation | |
6 | * Felipe Balbi <balbi@ti.com> | |
7 | * Santosh Shilimkar <santosh.shilimkar@ti.com> | |
8 | * Sricharan <r.sricharan@ti.com> | |
ed0e3520 | 9 | */ |
e2fa61d4 FB |
10 | |
11 | #include <linux/kernel.h> | |
12 | #include <linux/slab.h> | |
13 | #include <linux/platform_device.h> | |
14 | #include <linux/interrupt.h> | |
15 | #include <linux/io.h> | |
aa25729c TL |
16 | #include <linux/module.h> |
17 | #include <linux/of.h> | |
18 | #include <linux/of_device.h> | |
19 | ||
e2fa61d4 FB |
20 | #include "omap_l3_smx.h" |
21 | ||
22 | static inline u64 omap3_l3_readll(void __iomem *base, u16 reg) | |
23 | { | |
24 | return __raw_readll(base + reg); | |
25 | } | |
26 | ||
27 | static inline void omap3_l3_writell(void __iomem *base, u16 reg, u64 value) | |
28 | { | |
29 | __raw_writell(value, base + reg); | |
30 | } | |
31 | ||
32 | static inline enum omap3_l3_code omap3_l3_decode_error_code(u64 error) | |
33 | { | |
34 | return (error & 0x0f000000) >> L3_ERROR_LOG_CODE; | |
35 | } | |
36 | ||
37 | static inline u32 omap3_l3_decode_addr(u64 error_addr) | |
38 | { | |
39 | return error_addr & 0xffffffff; | |
40 | } | |
41 | ||
42 | static inline unsigned omap3_l3_decode_cmd(u64 error) | |
43 | { | |
44 | return (error & 0x07) >> L3_ERROR_LOG_CMD; | |
45 | } | |
46 | ||
47 | static inline enum omap3_l3_initiator_id omap3_l3_decode_initid(u64 error) | |
48 | { | |
49 | return (error & 0xff00) >> L3_ERROR_LOG_INITID; | |
50 | } | |
51 | ||
52 | static inline unsigned omap3_l3_decode_req_info(u64 error) | |
53 | { | |
54 | return (error >> 32) & 0xffff; | |
55 | } | |
56 | ||
57 | static char *omap3_l3_code_string(u8 code) | |
58 | { | |
59 | switch (code) { | |
60 | case OMAP_L3_CODE_NOERROR: | |
61 | return "No Error"; | |
62 | case OMAP_L3_CODE_UNSUP_CMD: | |
63 | return "Unsupported Command"; | |
64 | case OMAP_L3_CODE_ADDR_HOLE: | |
65 | return "Address Hole"; | |
66 | case OMAP_L3_CODE_PROTECT_VIOLATION: | |
67 | return "Protection Violation"; | |
68 | case OMAP_L3_CODE_IN_BAND_ERR: | |
69 | return "In-band Error"; | |
70 | case OMAP_L3_CODE_REQ_TOUT_NOT_ACCEPT: | |
71 | return "Request Timeout Not Accepted"; | |
72 | case OMAP_L3_CODE_REQ_TOUT_NO_RESP: | |
73 | return "Request Timeout, no response"; | |
74 | default: | |
75 | return "UNKNOWN error"; | |
76 | } | |
77 | } | |
78 | ||
79 | static char *omap3_l3_initiator_string(u8 initid) | |
80 | { | |
81 | switch (initid) { | |
82 | case OMAP_L3_LCD: | |
83 | return "LCD"; | |
84 | case OMAP_L3_SAD2D: | |
85 | return "SAD2D"; | |
86 | case OMAP_L3_IA_MPU_SS_1: | |
87 | case OMAP_L3_IA_MPU_SS_2: | |
88 | case OMAP_L3_IA_MPU_SS_3: | |
89 | case OMAP_L3_IA_MPU_SS_4: | |
90 | case OMAP_L3_IA_MPU_SS_5: | |
91 | return "MPU"; | |
92 | case OMAP_L3_IA_IVA_SS_1: | |
93 | case OMAP_L3_IA_IVA_SS_2: | |
94 | case OMAP_L3_IA_IVA_SS_3: | |
95 | return "IVA_SS"; | |
96 | case OMAP_L3_IA_IVA_SS_DMA_1: | |
97 | case OMAP_L3_IA_IVA_SS_DMA_2: | |
98 | case OMAP_L3_IA_IVA_SS_DMA_3: | |
99 | case OMAP_L3_IA_IVA_SS_DMA_4: | |
100 | case OMAP_L3_IA_IVA_SS_DMA_5: | |
101 | case OMAP_L3_IA_IVA_SS_DMA_6: | |
102 | return "IVA_SS_DMA"; | |
103 | case OMAP_L3_IA_SGX: | |
104 | return "SGX"; | |
105 | case OMAP_L3_IA_CAM_1: | |
106 | case OMAP_L3_IA_CAM_2: | |
107 | case OMAP_L3_IA_CAM_3: | |
108 | return "CAM"; | |
109 | case OMAP_L3_IA_DAP: | |
110 | return "DAP"; | |
111 | case OMAP_L3_SDMA_WR_1: | |
112 | case OMAP_L3_SDMA_WR_2: | |
113 | return "SDMA_WR"; | |
114 | case OMAP_L3_SDMA_RD_1: | |
115 | case OMAP_L3_SDMA_RD_2: | |
116 | case OMAP_L3_SDMA_RD_3: | |
117 | case OMAP_L3_SDMA_RD_4: | |
118 | return "SDMA_RD"; | |
119 | case OMAP_L3_USBOTG: | |
120 | return "USB_OTG"; | |
121 | case OMAP_L3_USBHOST: | |
122 | return "USB_HOST"; | |
123 | default: | |
124 | return "UNKNOWN Initiator"; | |
125 | } | |
126 | } | |
127 | ||
ed0e3520 | 128 | /* |
e2fa61d4 FB |
129 | * omap3_l3_block_irq - handles a register block's irq |
130 | * @l3: struct omap3_l3 * | |
131 | * @base: register block base address | |
132 | * @error: L3_ERROR_LOG register of our block | |
133 | * | |
134 | * Called in hard-irq context. Caller should take care of locking | |
135 | * | |
136 | * OMAP36xx TRM gives, on page 2001, Figure 9-10, the Typical Error | |
137 | * Analysis Sequence, we are following that sequence here, please | |
138 | * refer to that Figure for more information on the subject. | |
139 | */ | |
140 | static irqreturn_t omap3_l3_block_irq(struct omap3_l3 *l3, | |
141 | u64 error, int error_addr) | |
142 | { | |
ed0e3520 | 143 | u8 code = omap3_l3_decode_error_code(error); |
144 | u8 initid = omap3_l3_decode_initid(error); | |
145 | u8 multi = error & L3_ERROR_LOG_MULTI; | |
146 | u32 address = omap3_l3_decode_addr(error_addr); | |
e2fa61d4 | 147 | |
00d6bfaf | 148 | pr_err("%s seen by %s %s at address %x\n", |
ed0e3520 | 149 | omap3_l3_code_string(code), |
150 | omap3_l3_initiator_string(initid), | |
151 | multi ? "Multiple Errors" : "", address); | |
00d6bfaf | 152 | WARN_ON(1); |
e2fa61d4 FB |
153 | |
154 | return IRQ_HANDLED; | |
155 | } | |
156 | ||
157 | static irqreturn_t omap3_l3_app_irq(int irq, void *_l3) | |
158 | { | |
ed0e3520 | 159 | struct omap3_l3 *l3 = _l3; |
160 | u64 status, clear; | |
161 | u64 error; | |
162 | u64 error_addr; | |
163 | u64 err_source = 0; | |
164 | void __iomem *base; | |
165 | int int_type; | |
166 | irqreturn_t ret = IRQ_NONE; | |
e2fa61d4 | 167 | |
35f7b961 | 168 | int_type = irq == l3->app_irq ? L3_APPLICATION_ERROR : L3_DEBUG_ERROR; |
e2fa61d4 FB |
169 | if (!int_type) { |
170 | status = omap3_l3_readll(l3->rt, L3_SI_FLAG_STATUS_0); | |
171 | /* | |
172 | * if we have a timeout error, there's nothing we can | |
173 | * do besides rebooting the board. So let's BUG on any | |
174 | * of such errors and handle the others. timeout error | |
175 | * is severe and not expected to occur. | |
176 | */ | |
177 | BUG_ON(status & L3_STATUS_0_TIMEOUT_MASK); | |
178 | } else { | |
179 | status = omap3_l3_readll(l3->rt, L3_SI_FLAG_STATUS_1); | |
180 | /* No timeout error for debug sources */ | |
181 | } | |
182 | ||
e2fa61d4 | 183 | /* identify the error source */ |
342fd144 | 184 | err_source = __ffs(status); |
bc16b377 | 185 | |
342fd144 | 186 | base = l3->rt + omap3_l3_bases[int_type][err_source]; |
e2fa61d4 | 187 | error = omap3_l3_readll(base, L3_ERROR_LOG); |
e2fa61d4 FB |
188 | if (error) { |
189 | error_addr = omap3_l3_readll(base, L3_ERROR_LOG_ADDR); | |
e2fa61d4 FB |
190 | ret |= omap3_l3_block_irq(l3, error, error_addr); |
191 | } | |
192 | ||
193 | /* Clear the status register */ | |
35f7b961 | 194 | clear = (L3_AGENT_STATUS_CLEAR_IA << int_type) | |
195 | L3_AGENT_STATUS_CLEAR_TA; | |
e2fa61d4 FB |
196 | omap3_l3_writell(base, L3_AGENT_STATUS, clear); |
197 | ||
198 | /* clear the error log register */ | |
199 | omap3_l3_writell(base, L3_ERROR_LOG, error); | |
200 | ||
201 | return ret; | |
202 | } | |
203 | ||
aa25729c TL |
204 | #if IS_BUILTIN(CONFIG_OF) |
205 | static const struct of_device_id omap3_l3_match[] = { | |
206 | { | |
207 | .compatible = "ti,omap3-l3-smx", | |
208 | }, | |
209 | { }, | |
210 | }; | |
211 | MODULE_DEVICE_TABLE(of, omap3_l3_match); | |
212 | #endif | |
213 | ||
214 | static int omap3_l3_probe(struct platform_device *pdev) | |
e2fa61d4 | 215 | { |
ed0e3520 | 216 | struct omap3_l3 *l3; |
217 | struct resource *res; | |
218 | int ret; | |
e2fa61d4 FB |
219 | |
220 | l3 = kzalloc(sizeof(*l3), GFP_KERNEL); | |
7529b703 | 221 | if (!l3) |
222 | return -ENOMEM; | |
e2fa61d4 FB |
223 | |
224 | platform_set_drvdata(pdev, l3); | |
225 | ||
226 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
227 | if (!res) { | |
228 | dev_err(&pdev->dev, "couldn't find resource\n"); | |
229 | ret = -ENODEV; | |
7529b703 | 230 | goto err0; |
e2fa61d4 FB |
231 | } |
232 | l3->rt = ioremap(res->start, resource_size(res)); | |
35f7b961 | 233 | if (!l3->rt) { |
e2fa61d4 FB |
234 | dev_err(&pdev->dev, "ioremap failed\n"); |
235 | ret = -ENOMEM; | |
7529b703 | 236 | goto err0; |
e2fa61d4 FB |
237 | } |
238 | ||
18a81019 | 239 | l3->debug_irq = platform_get_irq(pdev, 0); |
d8bf368d VR |
240 | ret = request_irq(l3->debug_irq, omap3_l3_app_irq, IRQF_TRIGGER_RISING, |
241 | "l3-debug-irq", l3); | |
e2fa61d4 FB |
242 | if (ret) { |
243 | dev_err(&pdev->dev, "couldn't request debug irq\n"); | |
7529b703 | 244 | goto err1; |
e2fa61d4 | 245 | } |
e2fa61d4 | 246 | |
18a81019 | 247 | l3->app_irq = platform_get_irq(pdev, 1); |
d8bf368d VR |
248 | ret = request_irq(l3->app_irq, omap3_l3_app_irq, IRQF_TRIGGER_RISING, |
249 | "l3-app-irq", l3); | |
e2fa61d4 FB |
250 | if (ret) { |
251 | dev_err(&pdev->dev, "couldn't request app irq\n"); | |
7529b703 | 252 | goto err2; |
e2fa61d4 FB |
253 | } |
254 | ||
7529b703 | 255 | return 0; |
e2fa61d4 | 256 | |
e2fa61d4 | 257 | err2: |
7529b703 | 258 | free_irq(l3->debug_irq, l3); |
e2fa61d4 | 259 | err1: |
7529b703 | 260 | iounmap(l3->rt); |
e2fa61d4 | 261 | err0: |
7529b703 | 262 | kfree(l3); |
e2fa61d4 FB |
263 | return ret; |
264 | } | |
265 | ||
aa25729c | 266 | static int omap3_l3_remove(struct platform_device *pdev) |
e2fa61d4 FB |
267 | { |
268 | struct omap3_l3 *l3 = platform_get_drvdata(pdev); | |
269 | ||
270 | free_irq(l3->app_irq, l3); | |
271 | free_irq(l3->debug_irq, l3); | |
272 | iounmap(l3->rt); | |
273 | kfree(l3); | |
274 | ||
275 | return 0; | |
276 | } | |
277 | ||
278 | static struct platform_driver omap3_l3_driver = { | |
aa25729c TL |
279 | .probe = omap3_l3_probe, |
280 | .remove = omap3_l3_remove, | |
e2fa61d4 | 281 | .driver = { |
aa25729c TL |
282 | .name = "omap_l3_smx", |
283 | .of_match_table = of_match_ptr(omap3_l3_match), | |
e2fa61d4 FB |
284 | }, |
285 | }; | |
286 | ||
287 | static int __init omap3_l3_init(void) | |
288 | { | |
aa25729c | 289 | return platform_driver_register(&omap3_l3_driver); |
e2fa61d4 FB |
290 | } |
291 | postcore_initcall_sync(omap3_l3_init); | |
292 | ||
293 | static void __exit omap3_l3_exit(void) | |
294 | { | |
295 | platform_driver_unregister(&omap3_l3_driver); | |
296 | } | |
297 | module_exit(omap3_l3_exit); | |
be60566e AB |
298 | |
299 | MODULE_AUTHOR("Felipe Balbi"); | |
300 | MODULE_AUTHOR("Santosh Shilimkar"); | |
301 | MODULE_AUTHOR("Sricharan R"); | |
302 | MODULE_DESCRIPTION("OMAP3XXX L3 Interconnect Driver"); | |
303 | MODULE_LICENSE("GPL"); |